//
//  MainTabBar.swift
//  sinaweibo
//
//  Created by mac on 15/11/10.
//  Copyright © 2015年 mac. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

 
    override init(frame: CGRect) {
        super.init(frame: frame)
        setupUI()

    }
//如果重写 init(frame:) 系统会默认这个控件是代码生成 不能使用设备sb/xib
    required init?(coder aDecoder: NSCoder) {
        //如果有调用通过sb/xib创建了该对象,程序就会崩溃
        //fatalError("init(coder:) has not been implemented")
        super.init(coder: aDecoder)
        setupUI()

    }
    
    private func setupUI() {
        addSubview(composeBtn)
        
    }
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let w = self.bounds.width / 5
        let h = self.bounds.height
        let rect = CGRect(x: 0, y: 0, width: w, height: h)
        
        var index: CGFloat = 0
        for subview in subviews {
            if subview.isKindOfClass(NSClassFromString("UITabBarButton")!) {
                subview.frame = CGRectOffset(rect, index * w, 0)
                if index == 1 {
                    index++
                }
                index++
            }
        }
        composeBtn.frame = CGRectOffset(rect, w * 2, 0)
        bringSubviewToFront(composeBtn)
    }
       lazy var composeBtn: UIButton = {
            
        let btn = UIButton()
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState: UIControlState.Normal)
        btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: UIControlState.Highlighted)
        
        btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: UIControlState.Normal)
        btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: UIControlState.Highlighted)
        btn.sizeToFit()
        
            
        return btn
 
        
    }()
    
    
    

}
